Flush-valve.



UNrr n sra'rns PATENT oFFioE.

" EDGAR. 32 31206111 or Tirrm, 'onro.

FLUSH-VALVE.

- Application filed Octob To all whom'it may concern:

Be it known that I, E GAR J. BLooM, a citizen of the United States,residing at Tiflin, county of Seneca, State of Ohio, have invented acertain new and useful Improvement in Flush-Valves, and declare thefollowing'tobe a full, clear, and exact description of the same, such aswill enable others skilled in the art to which it pertains to make anduse the same, reference being had to the accompanying drawings, whichform a part of this specification.

This invention relates to flush valves.

It has for its object an improved valve which opens automatically andcloses automatically after the actuation of a pilot valve which isactuated manually.

In the drawings :-Figure 1, is a vertical cross section. Fig. 2, is ahorizontal cross section on a reduced scale. Fig.- 3, is a cross sectionshowing the adjusted ring 24 of Fig. l.

1 indicates a case which contains a cylin der 3 in which reciprocates apiston 4. The water is introduced into the case through a passage 5controlled by a manually actuated valve 6. The water enters the chamber7 from which it may pass through passage 8 directly into the pistonchamber or through passage 9 and a small passage 10 directly into thepiston chamber in the end opposite to that into which the water enterswhen entering through the passage 8. The passage 10 through the walls ofthe cylinder is quite small and is enlarged on the inside or toward thepiston chamber, and the small end of the passage is directed toward thepassage 9. The water entering the part 11 of the piston chamber isallowed to escape therefrom through passage 12 which is controlled by avalve 13 actuated by the push button 14. The water entering the oppositeend of the piston chamber escapes through the passage 16 into the finaldischarge conduit 17 through a constricted port 18. The passage 16 issmaller "than the passage 8, and the passage 18 is smaller than thepassage 16, the reduction or choking of the passage on this side beingfor the purpose of producing a constant opening pressure of the wateragainst the piston when water is passing through the ports 8, 16 and 18.

The piston 4 which reciprocates in the cylinder 3 is provided at one endwith a compression packing 20 that engages against the seat ring 21, andcompletely prevents water Specification of Letters Patent.

passing the ports 16 and 16*, the latter of which will be referred tolater. The compression packing 20 is smaller in diameter than-the piston4 and thereis a zone 28 exposed to .water in an annular chamber 29;

this pressure overbalances the pressure of the water in chamber 11 whenthe valve. 13 is open but is not equal to the pressure in chamber 11when the valve 13 is closed. On the entrance side to the cylinder thereare in addition to the ports 8 and 10 already described, two other ports22 and 23 of which I Patented Dec.10,1912l er 9, 1311. Serial No.653,696.

23 is seen in. F ig. 1. The ports 22 and '23 are so arranged withrespect'to'the port 8 that the piston 4 in closing does not entirelyshut ofl' the water entering the piston cham her until the compressionface 20 is finally seated against the seat 21, but the quantity Theentrance to said passage 16 is in its bearings to close, partiallyclose, or

leave entirely open the entrance to the passage 16. The ring is loose,held in position by friction only, and is, shifted by a spanner wrenchwhich engages into holes 25. On the opposite end of the piston 4 is athreaded hole in which is inserted a hollow-screw 26 within which asecond screw 27 engages, the latter screw serving as a lock screw forthe former, and the screw 26 adjusts the relative throw of the piston 4with reference to the valve 13; when the valve 13 is pushed in manually,the parts being in the position shown in Fig. 1, the water escapesthrough the passage 12 and the out-flow 12 thereof into the finaldischarge conduit 18 or its continuation 17, the piston now acted uponby the water which enters through passage 23 begins to travel toward thevalve-13 and continues to travel in that direction until the end of thescrew 26 engages the valve 13, pushes the valve 13 to its seat, closesthe outlet from the chamber 11, at which time the ports 8 and 16 areopen to the fullest extent allowed them with the adjustment given. Thewater from the main now delivers rapidly through the fiushing structureand continues to deliver rapidly until the piston closes the ports 8 and16 which occurs as soon as the water entering the chamber 11 through thesmall passage 10 has actuated the piston to close the ports 8 and 16 andaccumulated therein because valve 13 is closed. The heavy flush of watercontinues until the orts 8 and '16 close, after which there continues alighter flow of water entering through ports 22 and 23passing outthrough passage 16*. .refill andthe amount of'it may be adjusted by thering 24. The port 8 is larger than the port 16 and the port 16 is largerthan the passage 18 so that during the period of heavy flushing there isa back pressure in the piston chamber tending to-fully open the ports 8and 16; by fully opening, is meant pushing the piston over as far as itcan go toward the valve 13.

The terminal 12 to the passage 12 is led down into the reduced passage18 constituting the final outlet to provide against possible action ofwater from the passage 16 or 16 from backing into the passage 12 andpreventing the proper closing of the valve 13 on its seat. Preferably,the ports 8 and 16 are oval in construction with the long axis of theoval parallel with theaxis of the cylinder.

-What I claim is 1. A flush valve, having in combination, a cylinderthrough which there is a main water passage, a single-head pistonadapted to reciprocate in the cylinder and to control said main waterpassage, water passages for furnishing water under pressure through therespective end port-ions of. the cylinder to drive said piston both waysin the cylinder, thereby opening and closing the main water passage,the'pressure areas being arranged so that the piston normally closes themain ,water passage, a. drainage passage for relieving the pressure atone end of the cylinder to allow movement of the piston for the purposeof opening the main water passage, a push valve controlling saiddrainage passage and closing upon itsseat by the piston contacting itand arranged normally to be kept closed, substantially as described. a

2. A flush valve, having in combination, a horizontally disposedcylinder through WhlCh there is a main water passage, a piston adaptedto reciprocate in the cylinder and adapted to control sage, waterpassages opening into each end close the main water passage,

portion of the cylinder and adapted to furnish water under pressure todrive said piston both ways in the cylinder to open and 0 I the pressureareas being arranged so that the piston normally closes the main waterpassage, a drainage passage leading .out of one end ofthe cylinder forrelieving the pressure of the clyhnder at that end, to allow movement oft e piston for the purpose of opening the main water passage, ahorizontally disposed This is utilized as a said main water passage andclosing upon its seat by the piston contacting it and kept closed byreason of the horizontal disposition of the cylinder and valve,substantially as described.

3. A flush valve, having in combination, a cylinder having a main waterpassage directly across the cylinder, a single-head piston adapted tocontrol said main water passage and adapted to reciprocate thereacrossbut not interfere with the water flow through the main passage when itis in position to open such passage, a water passage for furnishing awater pressure that normally holds the piston in closed relation withthe main water passage, means for temporarily relieving said pressureand a second Water passage for furnishing a water pressurethat moves thepiston and opens the main water passage, when the first mentionedpressure is relieved, the uninterrupted main water passage across thepiston travel serving to resist the return or closing stroke of thepiston, substantially as described.

4. A flush valve, having in combination, a cylinder through which thereis a main passage, a singleead piston adapted to reciprocate in thecylinder and to control said main water passage withdrawing, in theopening operation, so thatthe entire piston is substantially out of thepath of the main water passage, water passages for furnishe ing waterpressure to drive said piston bot-h ways in the cylinder to open andclose the main water passage, the pressure areas being so arranged thatthe piston normally closes the main water passage, and means fortemporarily relieving the pressure at one end of the cylinder'to allowthe piston 'to enter upon the opening stroke, the said uninterruptedstream of water through the main water passage and across the end of thepiston acting to resist the return of the single-head piston so as toallow a period of opening in the main Water passage commensurate withthe pressure and hence to equalize in the case of-variantpressures theamount of water allowed to pass through the main passage, substantiallyas described.

- 5. A flush valve, having in comblnation a cylinderhaving a main waterpassage directly across the cylinder, a piston adapted to control themain water passage and adapted to reciprocate thereacross, a waterpassage for furnishing a water pressure that normally holds the pistonin closed relation with the main water passage, a drainage passage forrelieving said pressure, a push valve closed upon its seat by the pistonon its opening stroke, the said main water passage being constricted inits outlet from the cylinder so as to choke the water in the cylinderand thereby secure quick closing of the push valve by utilizing thepressure of the water in the main water passage to finish the openingstroke of the piston and a water passage for furnishing water pressureto start the piston on its opening stroke, sub-' rectly across thecylinder, a piston adapted to control the main water passage andreciprccate thereacross, a water passage for furnishing a water pressurethat normally holds the piston in closed relation with the main passage,a drainage passage for relieving said pressure, a push valve closed uponits seat by the piston on its opening stroke, the said water passageleading from the cylinder being contracted for the purpose of chokingthe water passing across said cylinder, substantially as, described.

7. A flush valve, having in combination, a cylinder provided with a mainwater passage directly across the cylinder, a piston adapted to controlthe main Water passage and adapted to reciprocate thereacross, a waterpassage for furnishing a water pressure that holds the piston normallyin closed relation with the main water passage, means for temporarilyrelieving said pressure, a water passage for furnishing water pressureto start the reciprocation of the piston to open the main water passage,and a refill passage near the limit of the return or closing stroke ofthe piston and controlled thereby, whereby the arrangement of the mainwater passage causes a resistance to the closing movement of the pistonthereby delaying the closing of the refill passage for suflicient timeto allow it to properly function, substantially as described.

8. A flush valve, having in combination, a cylinder provided with a mainwater passage directly across the cylinder, a piston adapted to controlthe main water passage and reciprocating thereacross, a water passagefor furnishinga water pressure that holds the piston normally in'closedrelation with the main water passage, means for temporarily relievingsaid pressure, a water passage for furnishing water pressure to startthe reciprocation of the piston to open the main water passage, and arefill passage near the limit of the return or closing stroke ofthepiston and controlled thereby, the said main water passage beingconstricted in its outlet from the cylinder so as to choke the water inthe cylinder, substantially as described.

9. A flush valve, having in combination, a cylinder through which thereis a main water passage, a piston adapted to reciprocate in the cylinderand to control the said main water passage, water passages for :turnishing water pressure to drive said piston both ways in the cylinder forthe purpose of closing and opening the main water passage, the pressureareas being arranged so that the tially as described.

piston normally closes the main water passage, means for.temporarilyrelieving the pressure at one end of the cylinder to allow the piston toenter upon its opening stroke 10. A flush valve, having in combination,

a cylinder through which there is a mainwater passage, a piston adaptedto reciprocate in the cylinder and adapted to control said main Waterpassage, water passages for furnishing water pressure to drive saidpiston both ways in the cylinder to open and close the main waterpassage, the pressure areas being arranged so that the piston normallycloses the main water passage, means for temporarily relieving thepressure at one end of the cylinder to allow the piston to enter uponits opening stroke and a refill passage controlled by the piston andlocated at the extreme end of the cylinder, the main water passage beinglocated so as to cross the path of the piston at the side of the refillpassage, the water flowing through said mam passage thereby affording aresistance to the piston on its closing stroke, substan- 11. A flushvalve, having in combination, a cylinder through which there is a mainWater passage extending directly across the cylinder, a pistonreciprocable in the cylinder and adapted-to control said main waterpassage, water passages for furnishing water pressure to drive saidpiston both ways in the cylinder for the purpose of opening and closingthe main water passage, the pressure areas being arranged so that thepiston normally closes the main water passage, means for temporarilyrelieving the pressure at one end of the cylinder to allow the piston toenter upon its opening stroke, and a refill passage controlled by thepiston and located at the extreme end of the cylinder, the said mainwater passage being constricted in its outlet from the cylinder so as tochoke the water in the cylinder, substantially as described.

12. A fiush valve, having in combination, a cylinder provided with amain water passage directly therethrough, a piston adapted toreciprocate in said cylinder and to control such drainage passage and awater passage at the opposite end of the cylinder from the water passagethat drives the piston into closed relation with the main water passageand adapted to furnish water pressure to In testimony whereof, I signthis specificastart the piston on its opening stroke When tion in thepresence of two witnesses.

the Water pressure at the opposite end is D temporarily relieved andadapted to act as a refill passage when the piston'is closing the mainwater passage, substantially as described.

EDGAR J. BLOOM.

Witnesses:

R. L. DE RAU, W. H. HIxoN.

